diff --git a/example/app.js b/example/app.js
index 44fca96..59f630f 100644
--- a/example/app.js
+++ b/example/app.js
@@ -1,4 +1,4 @@
-import Doodle3DManager from 'src/doodle3dmanager.js';
+import {Doodle3DManager} from 'src/index.js';
 
 const doodle3DManager = new Doodle3DManager();
 const TABLE = document.getElementById('table');
@@ -69,13 +69,13 @@ doodle3DManager.addEventListener('boxappeared', ({box}) => {
 
 	box.addEventListener('connect', (event) => {
 		row.style.color = 'black';
-	
+
 		box.addEventListener('update', update);
 	});
 
 	box.addEventListener('disconnect', (event) => {
 		row.style.color = 'gray';
-	
+
 		box.removeEventListener('update', update);
 	});
 
diff --git a/example/index.html b/example/index.html
index c89c8a2..45dbff1 100644
--- a/example/index.html
+++ b/example/index.html
@@ -24,19 +24,19 @@
 
 <table style="width:100%">
 	<tbody id="table">
-	<tr>
-		<th>ID</th>
-		<th>Local IP</th>
-		<th>State</th>
-		<th>Current Line</th>
-		<th>Buffered Lines</th>
-		<th>Total Lines</th>
-		<th>Hotend</th>
-		<th>Hotend Target</th>
-		<th>Bed</th>
-		<th>Bed Target</th>
-		<th>Has Control</th>
-	</tr>
+		<tr>
+			<th>ID</th>
+			<th>Local IP</th>
+			<th>State</th>
+			<th>Current Line</th>
+			<th>Buffered Lines</th>
+			<th>Total Lines</th>
+			<th>Hotend</th>
+			<th>Hotend Target</th>
+			<th>Bed</th>
+			<th>Bed Target</th>
+			<th>Has Control</th>
+		</tr>
 	</tbody>
 </table>
 
diff --git a/src/configapi.js b/src/configapi.js
index a7b5071..25fa330 100644
--- a/src/configapi.js
+++ b/src/configapi.js
@@ -14,8 +14,6 @@ export default class {
 	}
 
 	set (data) {
-		var scope = this;
-
 		return rest.post(`${this.api}config`, data);
 	}
 }
diff --git a/src/doodle3dapi.js b/src/doodle3dapi.js
index eb3c6db..e0ddc8e 100644
--- a/src/doodle3dapi.js
+++ b/src/doodle3dapi.js
@@ -1,5 +1,4 @@
 import EventDispatcher from 'casperlamboo/EventDispatcher';
-import * as rest from './restapi.js';
 import ConfigAPI from './configapi.js';
 import InfoAPI from './infoapi.js';
 import NetworkAPI from './networkapi.js';
@@ -22,7 +21,6 @@ export default class extends EventDispatcher {
 		this.state = {};
 
 		this.maxBatchSize = 10*1024;
-		this.maxBufferSize = 1024*1024;
 		this.fullBufferTimeout = 10000;
 
 		this.config = new ConfigAPI(this.api);
@@ -92,27 +90,16 @@ export default class extends EventDispatcher {
 			let lastIndex = 0;
 			let start = true;
 			while (lastIndex !== gcode.length) {
-				let index = gcode.lastIndexOf('\n', lastIndex + this.maxBatchSize);
+				let lastIndex = lastIndex + this.maxBatchSize;
+				let index = gcode.lastIndexOf('\n', lastIndex);
 				let batch = gcode.substring(lastIndex, index);
 
 				let progress = await this.printer.progress();
 
-				if (progress['buffered_lines'] + batch.length < this.maxBufferSize) {
-					try {
-						await this._sendBatch(batch, start);
+				await this._sendBatch(batch, start);
 
-						start = false;
-						lastIndex = index + 1; //skip next \n
-					}
-					catch (error) {
-						console.log('error while sending gcode', error);
-
-						await sleep(this.fullBufferTimeout);
-					}
-				}
-				else {
-					await sleep(this.fullBufferTimeout);
-				}
+				start = false;
+				lastIndex = index + 1; //skip next \n
 			}
 
 			this.autoUpdate = autoUpdateState;
@@ -139,12 +126,11 @@ export default class extends EventDispatcher {
 		}
 	}
 
-	_sendBatch (gcode, index) {
+	_sendBatch (gcode, start) {
 		return new Promise (async (resolve, reject) => {
 			try {
-				let first = index === 0;
-				let start = first;
-				let printRequest = await this.printer.print(gcode, first, start);
+				let response = await this.printer.print(gcode, start, start);
+				// maybe do something with failing response
 
 				console.log(`batch sent: ${index}`, printRequest);
 			}
diff --git a/src/doodle3dmanager.js b/src/doodle3dmanager.js
index 5d8fe1b..7790917 100644
--- a/src/doodle3dmanager.js
+++ b/src/doodle3dmanager.js
@@ -3,7 +3,7 @@ import Doodle3DAPI from './doodle3dapi.js';
 import EventDispatcher from 'casperlamboo/EventDispatcher';
 import {sleep} from './utils.js';
 
-export default class extends EventDispatcher {
+export default class Doodle3DManager extends EventDispatcher {
 	constructor () {
 		super();
 
@@ -23,7 +23,7 @@ export default class extends EventDispatcher {
 		this.autoUpdate = false;
 	}
 
-	setAutoUpdate (autoUpdate = true, updateInterval = 1000) {	
+	setAutoUpdate (autoUpdate = true, updateInterval = 1000) {
 		this.updateInterval = updateInterval;
 
 		if (this.autoUpdate === autoUpdate) {
@@ -50,45 +50,52 @@ export default class extends EventDispatcher {
 
 	_checkAlive () {
 		return new Promise(async (resolve, reject) => {
-			for (let box of this.boxes) {
-				let alive = await box.checkAlive();
 
-				if (!alive) {
-					this._removeBox(box);
-				}
-			}
+			await Promise.all(this.boxes.map((box) => {
+				let promise = box.checkAlive();
+				promise.then((alive) => {
+					if (!alive) {
+						this._removeBox(box);
+					}
+				})
+
+				return promise;
+			}));
+
 			resolve();
 		});
 	}
 
 	_checkNew () {
-		return new Promise(async (resolve, reject) => {		
+		return new Promise(async (resolve, reject) => {	
+			let boxes;	
 			try {
-				let boxes = await rest.get(`${this.api}list.php`);
-
-				if (this.checkNonServerBoxes) {
-					boxes = boxes.concat(this.nonServerBoxes);
-				}
-
-				let knownIPs = this.boxes.map((box) => box.boxData.localip);
-
-				for (let boxData of boxes) {
-					if (knownIPs.indexOf(boxData.localip) === -1) {
-						let box = new Doodle3DAPI(boxData);
-
-						let alive = await box.checkAlive();
-
-						if (alive) {
-							this._addBox(box);
-						}
-					}
-				}
-
-				resolve();
+				boxes = await rest.get(`${this.api}list.php`);
 			}
 			catch (error) {
-				console.warn('fail connecting to Doodle3D server');
+				console.warn('fail connecting to Doodle3D server', error);
+				return;
 			}
+
+			if (this.checkNonServerBoxes) {
+				boxes = [...boxes, ...this.nonServerBoxes];
+			}
+
+			let knownIPs = this.boxes.map((box) => box.boxData.localip);
+
+			for (let boxData of boxes) {
+				if (knownIPs.indexOf(boxData.localip) === -1) {
+					let box = new Doodle3DAPI(boxData);
+
+					let alive = await box.checkAlive();
+
+					if (alive) {
+						this._addBox(box);
+					}
+				}
+			}
+
+			resolve();
 		});
 	}